Six checks: llms.txt, llms-full.txt, .md twins, Accept: text/markdown, sitemap.md, alt link. Free.
Streamable HTTP
https://www.pathwren.workers.dev/c/mcp-registry-official/mcp/markdownclaude mcp add --transport http markdown-lane-check https://www.pathwren.workers.dev/c/mcp-registry-official/mcp/markdownThis server publishes no installable package.